Adjustable form for concrete structures



Oct. 13, 1925. 1 6, 0

C. C. SANER,

ADJUSTABLE FORM FOR CONCRETE STRUCTURES Filed May 31, 1923 Patented Oct. 13, 1925.

'OURTI/S o. Saran, or" ngiirsroamnqms.

AmUsrAnLnroRM VIE-R comma summers;

T 0 all whom itmay concern:

-BeiL mQ L -t at1., 'flv rls Q- fi li ia a ci izenf h nit @tateer adies 1 at Harms, Harrisffloue y, lexa a e rent a t ba ls-m w andsete ll rraiie ne it! A u tabl Farm i r- -ea e.e '.SP1"HQW}EQ$; which he iQ WiIi-e' is Hell, sle t a ti-ex c des la ip e such as a eeabla. l e 's sk lle ip as" ar o its. pertain -t ma and us -th same i 1 ycii r tion r lat s to i smsz rlusein the Qm nuction of s iwr te-s i stune .Iti r sti sla ly adapte i501 a s in b ild n himney sta ks but s capa l f arpli a en i0 eth r.e m larst ct in s- I An object of my invention is to provide teem wlx qhfi easi ydj s b /t0 di e e d am t rs and t sl fie nt deg e s oi taper l ima ymictere Amther Qbi s i to pi oriql a s mp e ef cieat-s ea ptbra ns the a ms Posiiiqn dur ngatbe buil'ql as-QP: eratiansna e th streams her ith,

whe ein li nemera sc ne e zencela e a1 p ie 71 9 like pa t n bo the t me Eig- 1 is a p plan i w d tai s-emb dyin mye entian, enraa edi Prop PQ Pi -c as m ing charmer el s i lig- 3 as de s r tipnl heteoi-.

.l'lnrsa rri-a u anyimeatiw l Moria? i a sierie w fp at slpr ie eb y vib s-W sh e meta which may b a ranged in 1 1 1. 'ht nositien side by s de t I Q. s-;a a e eras and s e ass .veta -s g We l its me ding chim y efc nq ste c ether sim mate ial Thes p ate ar testers-1 1w in shape and spm wha elQnsat-Qd a t We .Qf the Plat u n rds tpe u e th proper taper or batter of the chimney I contemplate using with the rectangular plates a predetermined number of plates which are slightly tapered so that the upper end thereof will be narrower than the lower end. Obviously, if a chimney is to be constructed with a certain taper thereto, it will be necessary, in order to get the proper difference in diameter between the lower and upper ends of the wall formed by the mold plates, to use a certain number of plates which decrease regularly in width from the lower to the upper end, and I contemplate spacing at approximately equal distances around the chimney the proper number of tapered plates to secure the desired taper to the chimney. I am aware a -Ya, wi a er .l esw t tia a lel es, s

.a s tolslecure t ie p ro'pejr taper to the chimney. I 4 d awing 1 .lilif Sh w iii-703150161 alls, makin Outer nd ne wa lan .2 zespee ye y- {he p e -1 m e-{ ub lofa -r i mlityo "p ates f heaw' h tir m whiqh a e a pr xi a ely n a lai in shapend may he fi s ta le width! A ong th se rate ar a fi a y o rl te$' l 1A h; e tan e l g y i em the. lower end towardjthepppeirend so to glaze the a ct a per upwardly in ac. seitdesce i h th, -..l s 1 ,f nm sh mii y wi e t b fiwflsfi i d- The pla si and .3 1 he eate Wal a e c t s ed-1wse he a the a lases i e b sen un l h Time.- 1 9 a e a e i li s i .i e i o ate in was w h t a s 10f file p afie ans i p f teie "a eg arste r ls tp-lr gistee i h sna s? creatures was s at s. wh le 4 a e use t s s s hei -420 i n s siti ii- "Ther e .ta ially are in im-san .t -sai trans and th sgi. is plerzfiqratad lsms t isi aa kv t. allp t l sa e th t zi 10f ti gha ts; sir i z41' i rsf phe yao th al the in ass eyer ap a shaw a and aura m s as M 1 a th adia entn time 9.1 time lapping plate are connected ,lby. means. qfla paced 1 'teryals se ie l ie. is along the ribs. lhese ti e bo are/ threaded item end ,to end and,h ave ,.nuts f thereon ar- 'l' ibs-l .B l ahte insa hes 'i at tl' i i z m beim e tetra! .ea whe -s eakin tighten the outer wal into the desired'position.

The outer wall is spaced from the inner wall by a series of cross pieces 10, which may be made of wood or similar construction of the desired length, to space the Walls apart the desired thiclmess of the wall.

The inner mold wall 2 is made up of plates, similar to those on the outer wall, some of which are tapered, and others not. The ribs 6 upon the T irons which are used to secure the plates together project inwardly in a radial direct-ion, and form supports for bracing bars or straps 11. These straps 11 are arcuate in shape, and have their ends w -mm? a th bent inwardly at 12 and perforated to allow the passage therethrough of a tie bolt 13. As will be noted from Fig. 1 there is a tie bolt through each of the ribs 6 on the T irons, arranged with a nut 14 on each side of the said rib. The outer end of the tie bolt on each side is passed through the inwardly bent end 12 of the strap 11 and a nut 15 at the end of said bracing strap is used to force the end of the strap inwardly and compress the said strap longitudinally thereof so as to bow the central portion outwardly against the inner face of the wall 2, thereby acting to retain said plates resiliently against the spacing bars 10. There are straps 11 between each of the said ribs. At one point 16 the plates overlap, as is the case in the outer wall, and to accommodate this variation in length of the bracing strap I form a strap of two sections, as shown at 17, the inner ends of which are perforated and secured in the proper posit-ion by bolts 18. The length of the strap 17 is thus adjusted before it is tightened against the inner wall by means of the nuts 15, as previously described. This means of bracing the inner wall of the mold is particularly 1 eflicient and easily applied, and is an important feature of my invention. By means of this bracing device the inner walls are retained in place without the necessity of the usual cross supports, and, as will be obvious, may be adjusted with very little difficulty, as many of these straps may be used longitudinally of the plates as is necessary to properly brace the construction. It is I, contemplated therefore, that they will be used in about the same number as are the apparent to one skilled in the art, without further description.

That I claim as new and by Letters Patent is:

1. A form for molding concrete walls desire to protect comprising inner and outer spaced walls made up of a series of oblong rectangular plates, havlng a predetermined number of regularly spaced plates tapered upwardly, means to hold said plates together and means to brace the plates of the inner wall radially outward, comprising straps of metal secured along the line of connection between the plates and means to compress said straps longitudinally thereof and thus force the said straps into supporting position against the plates in the manner described.

2. A form for molding concrete walls and the like comprising two spaced circular walls, approximately rectangular elongated plates, secured together along their sides by upright T bars to present radially extending ribs, having spaced perforations therein, means on the inner wall to brace said wall outwardly comprising resilient straps shorter than the width of said plates, threaded bolts extending through the perforations in said ribs and through the ends ofthe adjacent straps and means on said bolts to compress said straps to bow the said straps against said plates in the manner described.

3. In a form for molding walls of concrete and the like, two spaced circular walls made up of plates secured together along their adjacent sides by T-bars having radially extending ribs, a plurality of braces on the inner wall comprising curved resilient straps of metal secured adjustably between two of said ribs and means to compress said straps longitudinally thereof to bow the intermediate portion of said straps against said plates in the manner described.

4. In a form for molding concrete walls and the like, two spaced circular walls made up of longitudinal plates secured together along their adjacent sides by T-irons presenting radially extending ribs, screw bolts between two of the outer ribs whereby said plates may be held inwardly, and straps of resilient metal between adjacent ribs on the inner wall and means to compress said straps longitudinally in the manner described.

In testimony whereof, I hereunto aflix my signature, this the 26 day of May, A. D.

CURTIS C. SANER. 

